You should have 12v power at the regulators 3 and 4 terminals in order for the alternator to work, with the key on, and the motor not running... terminal 4 is you excitor terminal..Without 12 volts being supplied to that terminal, the alternator will not charge. Terminal 3 & 4 should be connected to 12 volts from the accessory side of the ignition switch. The idiot light wired inline in the wire that goes to the #4 terminal...
Try taking a jumper from the battery + terminal and jumping to terminals 3 and 4 onte regulator while the motor is running.....if the voltage comes up to 13.5 or more, you know that your idiot light is grounded somewhere or not hooked to the right place..
You will need to learn a little about schematics if you want to straighten out your charging systems problem .
When you wired in the toggle switches we have no way of knowing what you left out.
Here is a schematic for your charging system.
It may be because you disconnected the ignition side of the idiot light circuit and current is backfeeding through the resistor , to the switched side of your idiot light...The resistor is there in case the light burns out, the alt will still get the excitor current and then will charge.